Valve-grinder



l. H. JUST.

VALVE Gammes. APPLICA'ION FILED MAY I4 19|?.

Patented Aug. 19, 1919.

UnrrED sTArEs PATENT onirica.

JOHN JUST, OF'SYEAC'USE, NEW YORK.

vi'ALvE-GMNDER.

To all whom t may concern: Be it known that I, JOHN H. JUs'r, a citizen of the United States, residing at' racuse, in the. county of Onondaga andi tate of New York, have invented certain new and usefullmprovements in Valve-Grinders, ofwhic'h the following is a specification.

' This invention relates to improvements in valve grinders, designed particularly for grinding the valves'ot automobile-gildengines and the like, and has for its object generallyto-improve, simplify and cheapen devices of theclass.

y -The vatious features and parts of the invention will be understood from the detailed description which follows, and by reference to the accompanying drawings, in which- Flgure 1 is a view of the complete device in the actief grinding a valve.

Fig.` 2 is a central longitudinal section, taken on line 2--2 of Fig. 1. S

Fig. 3 fis a horizontal section taken on line 3--3 of Fig. 1. -V

Fig. 4 is a detail view of the bit equipped with Spanner-points for grinding spot-hole valves.

lin the drawing, 2 represents the body orl vertical guide-handle, lts upper end comprising a loop 3 for the insertion of a nger for supportin the grinder while in operation. The saiF loop is also employed for hanging up the device when not in use. The lower end of the body 2 is provided :with a substantially triangular loop 4, which is provided wlth concentric bearings 53 and 6, 1n which is journaled a round grinding bit 7. Thelower end of the bit is preferably Hat, like a screw driver, for engaging a slot 8 in the top of certain kinds of valves, as 9. Between the bearings 5 and 6 is disposed a bevel or miter gear 10, which is secured to the bit-stock by a pin 11, and rotates with and drives the bit 7 during the grindingv when there is a certain amount of longitudinal or upward thrust against the bearing 5. A second ball-bearing comprising a race or cu 12 and balls 13', held in place by a co ar 14 and a pin 14', may be disposed immediately below the bearings 6, as shown in Speeleation of Letters Patent.

Application med-any 14, 1917. serial No. 108,397.

is vpreferably connected integrally with al 'handle 16 by arms 15', and these parts are pivoted to the -body 2 above the bearin 5 'by a pin 17, which pierces the inner en of the handle 1 6 and also the body 2. The pin V17 has a relatively broad head 17 at one end, while the other end is upset for making the pin rigid with the body, as well as for preventing the loosening or detachment of the parts. The handle 16 is preferably of web construction, for rendering it light, and at the same time giving it adequate strength. The rocking of the handle 16 upwardly and downwardly like a pump handle rotates 'the gear 10 and the bit 7, and also the valve 9, for edecting the proper grinding of. the

valve. The arrows in Fig. l show the eX- tent of the movement o the handle 16 during the grinding operation. ri-he dotted lines 18 (Fig. 1) indicate the closed or folded-up position of the parts, when the device is to be packed for shipment or laid' away. The pivot pin 17 is so positioned that the weight of the device above and below said pivot is substantially equal, so that when the operator grasps the handle 16 and holds it at right angles to the body and bit the device is perfectly balanced. By thus balancing the device it is more easily held in true upright position, which facilitates the true grinding of the valve. The total weight of the device is such that but little eXtra pressure'is required in order to properly grind the valve. A 'linger or guard 19 is secured to the outer surface of the bearing 6 by a screw 20. The free end of the linger 19 overlapsthe rack 15, for preventing its dis-engagement with the teeth of the gear 10.

Fig. 1 shows the bit 7 inserted downwardly in the usual valve casing A and engaging the slot in the valve. Preparatory to the grinding of the valve, the latter is rst lifted fromits seat 9 in a well-known manner, for releasing the pin (not'shown) which usually holds the valve in place, after which a spring 21 is temporarily disposed beneath the valve (see Fig. 1). This spring tends to resiliently lift the valve away from the seat 9' whenever the pressure of the grinder is relaxed and thisallows the operator, by slightly shifting the position of the ferent valves,

grinder after several upward and downward strokes of the handle 16,130 change the posi- 4tion of the valve relatively to the seat, so

as to prevent ringing or otherwise unevenly grinding the valve. In this way, the shifting of the valve in the seat may be accomplished withoult dis-engaging the grinder.

Some valves, as 22, are provided with spot-holes 23 (see Fig. 4) for use in grindf ing the valves instead of the -slots 8, and

be folded upwardly out of the way as shown by the tdotted lines in Fig. 4.

In both construction and operation, my valve grinder is' extremely simple. It is light in wei ht, but strong and durable, and owing to its peculiar design, and its direct and positive caring, as well as the novel and convenient y disposed handle, the device may be used 1n close quarters, and the valves'maybe readily, quickly and truly ground. The equal distribution of the weight of the grinder above and below the handle pivot 17 insures the perfect and true grinding of the valves, and the said work can be accomplished with greater facility and more rapidly than by the use of any other device of the class known to me.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is

A tool of the character' described comprising a supporting member having a transverse bearmg therein, and a vertical bearing below said transverse bearing, an implement rotatably mounted in said vertical bearing and having secured thereto a pinion, and means for operating the pinion to rotate the tool comprising a toothed segment mounted to swing from the transverse bearing, said segment having an integral handle projecting outwardly therefrom on the same side of the vertical supporting member as the segment and at right angles to a line intersectin the central portion of the segment wherey a movement of the handle on one side of the supporting member permits the entire toothed portion of the segment to coperate with the pinion to rotate the same.

In testimony whereof I aix my signature.

JOHN H. lJUST. 

